A 3 1/2-minute analysis — filmed last Thursday, before the most recent insurgent advances in and near Aleppo — on the significance of the opposition’s attempt to cut off the regime in Syria’s largest city:

If insurgents continue to make these grinding advances, they may not have to move into the city and take over the regime-held western sections of Aleppo. They can slowly win a war of attrition.

That is a significant event, as significant as any regime success about which we have heard in the last two months. And it is one — although you may not hear about it — has the Assad regime worried.